Dr Roy Caldwell's Blue Ring Octopus Picture

TONMO Supporter

Dr Caldwell has kindly given me permision to share a picture with you.

He states that, 'Attached is a photo I took of a female Haplalochlaena lunulata threatening at another female that is behind her. The aggressive female is using what I've been calling the "umbrellla" display. You are looking at her ventral surface (mouth visible). This is not the surface that is displayed to the opponent.'